Milk and feed consumption were monitored in fifteen Holstein cows divided in 3 groups: T1 (control), T2 (sodium monensin - 300 mg/head) T3 (sodium monensin - 225 mg/head). After an experimental period of 112 days, there were 13.5% and 10% (T2) increase in milk production as compared to the control and T3 respectively, and also a feed intake reduction 4.5% (T2) and 3% (T3) as compared to the control.
milk production; ionophore
